upgrade matches api

src/Skat/Matches.hs

@@ -1,5 +1,6 @@
 module Skat.Matches (
-    singleVsBots, pvp, singleWithBidding, Match(..), Unfinished(..), continue
+    singleVsBots, pvp, singleWithBidding, Match(..), Unfinished(..), continue,
+    Table(..)
 ) where
 
 import Control.Monad.State
@@ -18,6 +19,11 @@ import Skat.AI.Rulebased
 import Skat.AI.Online
 import Skat.AI.Stupid
 
+data Table = Unfinished Unfinished
+           | Finished Match
+           | Pass { tablePiles :: Piles }
+             deriving Show
+
 data Match = Match { matchPiles :: Piles
                    , matchResult :: Result
                    , matchTricks :: [Trick]
@@ -30,7 +36,7 @@ data Unfinished = UnfinishedGame { unfinishedGame :: SkatEnv
                 | UnfinishedPrep { unfinishedPrep :: PrepEnv }
                   deriving Show
 
-continue :: Communicator c => Unfinished -> c -> c -> c -> IO (Either Unfinished (Maybe Match))
+continue :: Communicator c => Unfinished -> c -> c -> c -> IO Table
 continue (UnfinishedGame skatEnv prepEnv tricks) comm1 comm2 comm3 = do
     let ps = players skatEnv
         ps' = Players
@@ -46,14 +52,16 @@ continue (UnfinishedGame skatEnv prepEnv tricks) comm1 comm2 comm3 = do
         prepEnv' = prepEnv { bidders = bs' }
     runGame prepEnv' skatEnv'
 
-match :: PrepEnv -> IO (Either Unfinished (Maybe Match))
+match :: PrepEnv -> IO Table
 match prepEnv = do
     (maySkatEnv, prepEnv') <- runStateT runPreperation prepEnv
     case maySkatEnv of
         Just skatEnv -> runGame prepEnv' skatEnv
-        Nothing -> putStrLn "no one wanted to play" >> return (Right Nothing)
+        Nothing -> do
+            putStrLn "no one wanted to play"
+            return $ Pass $ Skat.Preperation.piles prepEnv'
 
-runGame :: PrepEnv -> SkatEnv -> IO (Either Unfinished (Maybe Match))
+runGame :: PrepEnv -> SkatEnv -> IO Table
 runGame prepEnv skatEnv = do
     (isFinished, finalEnv, tricks) <- (flip runSkat) skatEnv $ do
         -- send current table cards to clients
@@ -74,10 +82,9 @@ runGame prepEnv skatEnv = do
                 (Skat.Preperation.piles prepEnv)
                 (Skat.piles finalEnv)
         publishGameResults res (bidders prepEnv)
-        return $ Right $ Just $
-            Match (Skat.Preperation.piles prepEnv) res tricks (skatSinglePlayer skatEnv)
+        return $ Finished $ Match (Skat.Preperation.piles prepEnv) res tricks (skatSinglePlayer skatEnv)
     else do -- if not finished an error has occured, thus returning unfinished game state
-        return $ Left $ UnfinishedGame finalEnv prepEnv tricks
+        return $ Unfinished $ UnfinishedGame finalEnv prepEnv tricks
 
 -- | predefined card distribution for testing purposes
 cardDistr :: Piles
@@ -115,7 +122,7 @@ singleWithBidding comm = do
         env = makePrep ps bs
     void $ match env
 
-pvp :: Communicator c => c -> c -> c -> IO (Either Unfinished (Maybe Match))
+pvp :: Communicator c => c -> c -> c -> IO Table
 pvp comm1 comm2 comm3 = do
     cards <- shuffleCards
     let ps = distribute cards